So I noticed this in dmesg:
AppleRAID::completeRAIDRequest - error 0xe00002d6 detected for set "Untitled RAID Set 1" (89AE8501-EE3F-464A-8D85-4FBA55555568), member 0753BC13-0D12-47B8-88D6-464F0B9880EB, set byte offset = 153894912.
AppleRAID::recover() member 0753BC13-0D12-47B8-88D6-464F0B9880EB from set "Untitled RAID Set 1" (89AE8501-EE3F-464A-8D85-4FBA55555568) has been marked offline.
AppleRAID::restartSet - restarting set "Untitled RAID Set 1" (89AE8501-EE3F-464A-8D85-4FBA55555568).
and then checked ...
[gandalf:~] dluke% diskutil checkRAID
RAID SETS
---------
Name: Untitled RAID Set 1
Unique ID: 89AE8501-EE3F-464A-8D85-4FBA55555568
Type: Mirror
Status: Degraded
Device Node: disk2
Apple RAID Version: 2
----------------------------------------------------------------------
# Device Node UUID Status
----------------------------------------------------------------------
0 disk0s3 0753BC13-0D12-47B8-88D6-464F0B9880EB Failed
1 disk1s3 06979115-A2A4-4326-B9D2-1EC253E9AC60 Online
----------------------------------------------------------------------
d'oh!
I couldn't pull up the smart status for that drive either.
So I went to reboot the machine, hoping that it would come back up and either let me rebuild the arrray, or just start rebuilding it.
It didn't want to come back up normally, so I hit the power on the UPS and it did.
Now I see the much happier:
[gandalf:~] dluke% diskutil checkRAID
RAID SETS
---------
Name: Untitled RAID Set 1
Unique ID: 89AE8501-EE3F-464A-8D85-4FBA55555568
Type: Mirror
Status: Degraded
Device Node: disk2
Apple RAID Version: 2
----------------------------------------------------------------------
# Device Node UUID Status
----------------------------------------------------------------------
0 disk0s3 0753BC13-0D12-47B8-88D6-464F0B9880EB 0% (Rebuilding)
1 disk1s3 06979115-A2A4-4326-B9D2-1EC253E9AC60 Online
----------------------------------------------------------------------
SMART status looks OK too:
% smartctl -H disk0
smartctl version 5.33 [powerpc-apple-darwin8.7.0] Copyright (C) 2002-4 Bruce Allen
Home page is http://smartmontools.sourceforge.net/
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
Hopefully I don't need to buy a new drive and install it in jared's basement ...
